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scenario-unity-world-building

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Use when building a Unity 6.3 level or open world: terrain from code or heightmaps, procedural islands, erosion, splat and foliage rules, trees and grass, ProBuilder graybox, level gym, modular kit and prefab placement, set dressing, landmarks and player guidance, the island's edge, spline roads, WFC, fog, additive scene streaming, or a world that hitches, pops in, leaks memory or runs slow on mobile. Keywords: Terrain, TerrainData, ProBuilder, blockout, graybox, modular kit, NavMesh, LoadSceneAsync, open world.

skills/game-engines/unity/scenario-unity-world-building/SKILL.md

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Network or broad shell
Last checked
Nov 9, 2026

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3,554
Repository last updated
Nov 8, 2026
License
MIT

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# Unity world building (level and environment artist)

Expert world building is structure first, then generated content that can be regenerated, then
proof: the character fits every space, the camera fits every doorway, the player can reach every
space and walk back, the edge of the world holds content, and the worst viewpoint holds the frame
budget in a Player. An agent without a mouse does all of it through `TerrainData`, the ProBuilder
API, `PrefabUtility` and scene APIs, then checks with raycasts, NavMesh paths, captures, a profiling
tour and a Player probe. Target: Unity 6000.3.21f1, URP 17.3, ProBuilder 6.1.2, Splines 2.9.0, AI
Navigation 2.0.14. If a sibling skill named here is missing from your available skills, load it with
`skill_get` (Scenario MCP) or ask the user to install it
(https://github.com/scenario-labs/skills#install); unattended, proceed from tool schemas and flag
the gap.

**REQUIRED BACKGROUND:** scenario-unity-expert (channels, review loop, 6.3 traps). Import its